Segal Supply — mock CAD asset SKU: 4240-00-540-0623 Name: Welder'S Helmet Format: STL Standards: NSN 4240-00-540-0623, FSC 4240 Generated: 2026-06-18T18:10:32.438Z NOTE: placeholder geometry for demonstration. Production assets stream from the CAD repository behind this same URL with DATA_SOURCE=live.